/Engine/Source/Runtime/CoreUObject/Public/AssetRegistry/AssetBundleData.h
Adds or updates an entry with the given BundleName -> Path, truncating to a top-level asset path if necessary.
void AddBundleAssetTruncated ( [FName](API\Runtime\Core\UObject\FName) BundleName, const [FSoftObjectPath](API\Runtime\CoreUObject\UObject\FSoftObjectPath) & AssetPath )